Dorelink Dorelink

40G QSFP+ Module Manufacturer & Factories Serving Hanoi

High-Density Optical Transceivers for Enterprise Data Centers & Telecommunication Networks in Vietnam

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Powering Hanoi's Digital Infrastructure Upgrade

High-reliability optical transmission systems engineered for Northern Vietnam’s smart city grids, hyper-scale cloud facilities, and industrial clusters.

As the metropolitan administrative center and rapid technology adopter of Northern Vietnam, Hanoi is driving high-speed data architecture under the national digital transformation initiative. From enterprise datacenters situated in the Hoa Lac High-Tech Park to massive campus deployments for VNPT, Viettel, and FPT Telecom, the demand for high-capacity, low-latency interconnects is surging. High-performance 40G QSFP+ optical transceiver modules represent the essential backbone that integrates modern cloud resources, switching fabric, and edge nodes.
Dorelink Optical Communications Co., Ltd. serves as the premier manufacturing partner bridging the gap between state-of-the-art Chinese manufacturing capacity and the rapid fiber infrastructure deployments in Hanoi. Operating an advanced 18,500m² factory, we implement rigorous signal integrity engineering to supply high-reliability transceivers. By streamlining transit corridors from Nanning/Pingxiang to Hanoi, we bypass standard shipping bottlenecks, offering local system integrators unmatched cost-efficiencies and delivery certainty.

Industrial Context & Local Application Scenarios

Analyzing Hanoi’s digital transition, regional telecom topology, and specific deployment environments.

Northern Vietnam is establishing itself as an international manufacturing hub. The digital infrastructure powering these operations must accommodate exponential data processing. Companies operating high-tech manufacturing plants in Bac Ninh, Thai Nguyen, and Hai Phong rely on central databases hosted in Hanoi’s Tier III and IV data centers. This regional interconnection utilizes 40G QSFP+ Optical Modules to ensure that live ERP databases, raw manufacturing logs, and automated assembly vision systems operate with negligible packet drop.
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Hanoi Metro Data Center Interconnect (DCI)

Establishing links between dispersed regional server centers using 40G QSFP+ LR4 and ER4 transceivers for robust 10km to 40km single-mode optical spans without requiring intermediate amplification.

Telecom Metro Ring Aggregation

Enabling regional mobile providers to upgrade backbone switches from legacy 10G channels to aggregated 40G pipes, supporting high-density FTTH networks and regional 5G baseband stations.

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Industrial Automation Networks

Powering local high-tech assembly lines with EMI-resistant fiber systems that connect field monitoring hardware directly to local network control clusters with zero RF interference.

Technical Matrix: 40G QSFP+ Standards

Compare transceivers to select the optimal model for Hanoi data center environments.

Module Type Wavelength Connector Type Fiber Type Max Transmission Distance Typical Application
40GBASE-SR4 850nm MPO/MTP-12 Multi-mode (OM3/OM4) 100m (OM3) / 150m (OM4) Intra-rack or rack-to-rack datacenter switch links
QSFP+ BiDi 850nm / 900nm Duplex LC Multi-mode (OM3/OM4) 100m (OM3) / 150m (OM4) Upgrading 10G to 40G using existing LC patch cables
40GBASE-LR4 CWDM (1271-1331nm) Duplex LC Single-mode (SMF) 10km Inter-building campus loops and telecom aggregation
40GBASE-ER4 CWDM (1271-1331nm) Duplex LC Single-mode (SMF) 40km Longer regional loops, link backhaul, remote offices
40GBASE-ZR4 CWDM (1271-1331nm) Duplex LC Single-mode (SMF) 80km Hanoi-to-suburb industrial zone DCI without EDFA

Dorelink Manufacturing Capabilities & Export Reach

Your trusted global supplier of advanced optoelectronic components and custom network interfaces.

Founded in 2016, Dorelink Optical Communications Co., Ltd. leads in the engineering and production of active and passive optical transceiver equipment. With over 12 years of core industry experience, our R&D and production units support networks globally, from the Americas to ASEAN telecom rings.
18,500㎡
Factory Footprint
$18M USD
Annual Export Value
120+
R&D Engineers
850+
Supply Chain Partners
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Supply Chain Resilience: China to Vietnam Logistics Advantage

Seamless cross-border integration to eliminate project delays in Hanoi's high-tech corridors.

In the networking sector, delayed hardware components can stall high-value construction. Choosing Dorelink as your specialized manufacturing partner provides a distinct geographic advantage. Our main factories in Southern China are positioned close to key cross-border transportation routes, allowing fast overland transport from Guangxi directly to Northern Vietnam.
Through established transport routes passing through the Huu Nghi border gate in Lang Son, we achieve cargo transit times of 24 to 48 hours from our shipping bays to your integration centers in Hanoi. This bypasses the unpredictability of maritime shipping and high air freight rates. For Vietnamese system integrators, this logistics efficiency ensures consistent project timelines, prompt delivery of replacement parts, and minimal customs delays.

Rigorous Quality Control & Testing Methodology

Behind our optical products is a dedicated QC workflow designed to secure high-performance connections.

Every optical transceiver manufactured by Dorelink undergoes systematic, multi-stage evaluations before final dispatch. Because optical transmission is susceptible to micro-contamination and manufacturing variances, we maintain a dedicated 45-person QC inspection team who oversee key quality checkpoints:
1. Incoming Material Control (IQC)

All incoming sub-components, including TOSA, ROSA, laser diodes, and printed circuit board assemblies (PCBAs), undergo inspection to confirm physical alignment and parameters meet baseline standards.

2. In-Process Validation (IPQC)

Automated optical assembly stations continuously verify transmitter optical power, receiver sensitivity, and electrical current levels during production, reducing assembly anomalies.

3. Environmental Stress & Reliability

Modules undergo thermal chamber cycling (ranging from -40°C to +85°C) and continuous aging tests under load to check for component fatigue before shipment.

To ensure field compatibility, Dorelink transceivers undergo firmware verification in our compatibility lab. Modules are tested against target network environments (including switches and routers from Cisco, Juniper, Huawei, HPE, Dell, Arista, and others). This minimizes integration issues, allowing engineers in Hanoi to install the modules straight out of the box.

Our Advanced Production and Research Facilities

Tour our production bays, automated assembly zones, and engineering labs.

Optical Assembly Facility Testing and Verification Lab Automated Alignment Systems Advanced Clean Room Production Final Quality Check Lab

Frequently Asked Questions (FAQ)

Get answers to technical and logistics questions about our 40G QSFP+ transceivers.

How does Dorelink guarantee compatibility with legacy systems in Vietnam? +
Our modules feature custom-coded EEPROM configurations designed to match host switch software. During ordering, customers specify the target equipment brand (e.g., Cisco, Juniper, HP, or Mikrotik), and our engineering team programs the transceivers for compatibility, supporting Digital Diagnostic Monitoring (DDM) reporting.
What is the standard logistics timeline from Dorelink's facility to Hanoi? +
For products in stock, transit via overland freight through the Pingxiang-Lang Son border corridor typically takes 24 to 48 hours to reach integration sites or data centers in Hanoi. Custom OEM manufacturing cycles depend on quantity, generally taking between 7 to 14 business days.
What are the differences between 40GBASE-SR4 and 40GBASE-LR4 transceivers? +
40GBASE-SR4 operates at 850nm over multi-mode fiber (OM3/OM4) for distances up to 150m, using an MPO-12 connector. 40GBASE-LR4 multiplexes four wavelengths near 1310nm over single-mode fiber (SMF) via duplex LC connectors, supporting distances up to 10km for long-haul inter-building links.
Do Dorelink modules comply with RoHS and global environmental standards? +
Yes, our entire optical module portfolio is fully compliant with CE, FCC, and RoHS standards. Our manufacturing processes utilize lead-free soldering and eco-friendly packaging, meeting international standards.

Request a Quote for Your Network Project

Need custom configurations or bulk pricing for Hanoi regional network upgrades? Contact our engineering team today.

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